Air core reactor tap changer

Abstract

The invention discloses a tap switch of an air reactor. The tap switch comprises a driving motor, a transmission lead screw, a nut, conductive moving contacts, a conductive plate and conductive platecylinders. The upper end of the driving motor is connected with the transmission lead screw; the nut is arranged at the transmission lead screw in a cooperative manner; and a sliding unit is arrangedat the outer side of the nut. A limiting guide rod is arranged at the outer side of the nut; the upper part of the limiting guide rod corresponds to an upper-end pneumatic mechanical valve at the topof a switch; and the lower part of the limiting guide rod corresponds to a lower-end pneumatic mechanical valve at the bottom of the switch. The conductive moving contacts are arranged above the nut.The conductive plate is arranged at the top of a tap switch; the conductive plate cylinders are arranged above the conductive plate; and piston ends of the conductive plate cylinders are fixed with the conductive plate. According to the invention, the tap switch is made of a non-permeability-magnetic material; the pneumatic motor is used for driving to realize turning on or off of the switch; andthe lead screw rotates to drive the nut to move up and down in terms of the transmission part and the lead screw is processed by using an insulating material, so that the mechanical strength and the insulation performance are guaranteed.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a tap changer. Background technique [0002] The high-voltage test reactor group needs to match different reactance values ​​during the test process. In the past, to achieve this purpose, it was necessary to manually connect the wires to the two ends of different reactors to short-circuit the reactors to achieve different reactance values. The connecting switch is installed outside the reactor, which occupies a large space and affects the insulation. Now there is a need for a switch, which is installed inside the reactor coil, and the breaking operation is carried out along the center line of the reactor. When the switch is turned off, the reactor is connected to the loop, and when the switch is closed, the reactor is shorted. Because the reactor operates at high voltage, there must be no magnetically conductive material in the switch, and the switch must have high insulation p...

AI Technical Summary

Problems solved by technology

The current schemes are cylinder type and pulley type. The cylinder type is to install an extended cylinder inside the switch, and the switch is opened and closed by the lifting of the cylinder. Due to the long breaking distance, the movement of the cylinder is unstable, and the insulation distance of the cylinder is also reduced; The pulley type cannot have magnetic materials, so it can only be driven by rubber belts, and the reliability of long-term operation is very poor.

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